膜下滴灌对旱地菜豆水分利用和产量的影响

Effects of under Mulch Drip Irrigation on Water Use Efficiency and Yield of Dryland Kidney Bean

通过研究不同膜下滴灌水量对旱地菜豆耗水量、水分利用效率和产量的影响。结果表明,随着灌水量的增加,旱地菜豆各生育期耗水量分别呈增加趋势;在整个生育期,各处理土壤水分消耗的变化均呈线性上升趋势,结荚盛花期是需水高峰期;在各灌水处理中,T3处理的产量和水分利用效率最高,分别达到了26 456.2 kg/hm2和80.8 kg(/mm.hm2);旱地菜豆的耗水量与产量、水分利用效率间均呈2次曲线关系,相关系数分别为0.945 8,0.867 4,均达极显著相关水平。

The water consumption,WUE and yield of dryland kidney bean under mulch drip irrigation were studied. The results showed that the water consumption for the kidney bean at different stages increased with irrigation quantity increasing. During the whole growing stage the water consumption had similar and upward tendency under the different irrigation treatments and the maximum water demand at bloom pod setting stage. Among different irrigation treatments, the highest yield and WUE ofT3 arrived 26 456.2 kg/hm^2 and 80.8 kg/ （mm· hm^2）. The relationship of the yield, WUE and water consumption of the kidney hean apeared to be the parabolic curve with correlation coeficiencies 0.945 8 and 0.867 4 respectively.